随笔分类

一，数据表（因为是一个小例子，所以只有一个表，毕竟这不是一个讲怎么配置hibernate级联的例子。）
CREATE TABLE `members` (
`id` int(7) NOT NULL auto_increment,
`name` varchar(20) NOT NULL default '',
`password` varchar(20) default NULL,
`sex` varchar(10) default NULL,
`mail` varchar(50) default NULL,
PRIMARY KEY (`id`),
UNIQUE KEY `name` (`name`)
) ENGINE=MyISAM AUTO_INCREMENT=4 DEFAULT CHARSET=utf8
二，hibernate持久化类及映射文件、数据库操作封装DAO
package com.yang.product.booksonline.dao;

/**
* Members
*/

public class Members implements java.io.Serializable {

  // Fields  

  private Integer id;
  private String name;
  private String password;
  private String sex;
  private String mail;

  // Constructors

  /** default constructor */
  public Members() {
  }

     /** minimal constructor */
  public Members(String name) {
    this.name = name;
  }
 
  /** full constructor */
  public Members(String name, String password, String sex, String mail) {
    this.name = name;
    this.password = password;
    this.sex = sex;
    this.mail = mail;
  }

 
  // Property accessors

  public Integer getId() {
    return this.id;
  }
 
  public void setId(Integer id) {
    this.id = id;
  }

  public String getName() {
    return this.name;
  }
 
  public void setName(String name) {
    this.name = name;
  }

  public String getPassword() {
    return this.password;
  }
 
  public void setPassword(String password) {
    this.password = password;
  }

  public String getSex() {
    return this.sex;
  }
 
  public void setSex(String sex) {
    this.sex = sex;
  }

  public String getMail() {
    return this.mail;
  }
 
  public void setMail(String mail) {
    this.mail = mail;
  }
}

<?xml version="1.0"?>
<!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping>
  <class name="com.yang.product.booksonline.dao.Members" table="members" catalog="books">
    <id name="id" type="integer">
        <column name="id" />
        <generator class="native" />
    </id>
    <property name="name" type="string">
        <column name="name" length="20" not-null="true" unique="true" />
    </property>
    <property name="password" type="string">
        <column name="password" length="20" />
    </property>
    <property name="sex" type="string">
        <column name="sex" length="10" />
    </property>
    <property name="mail" type="string">
        <column name="mail" length="50" />
    </property>
  </class>
</hibernate-mapping>

package com.yang.product.booksonline.dao;

import java.util.List;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.LockMode;
import org.hibernate.criterion.Example;
import org.springframework.context.ApplicationContext;
import org.springframework.orm.hibernate3.support.HibernateDaoSupport;

/**
* Data access object (DAO) for domain model class Members.
* @see com.yang.product.booksonline.dao.Members
* @author lanxincao
*/
public class MembersDAO extends HibernateDaoSupport {

  private static final Log log = LogFactory.getLog(MembersDAO.class);

     protected void initDao() {
           //do nothing
     }
 
  public void save(Members transientInstance) {
    log.debug("saving Members instance");
    try {
        getHibernateTemplate().saveOrUpdate(transientInstance);
        log.debug("save successful");
    } catch (RuntimeException re) {
        log.error("save failed", re);
        throw re;
    }
  }
 
     public void delete(Members persistentInstance) {
    log.debug("deleting Members instance");
    try {
        getHibernateTemplate().delete(persistentInstance);
        log.debug("delete successful");
    } catch (RuntimeException re) {
        log.error("delete failed", re);
        throw re;
    }
  }
 
  public Members findById( java.lang.Integer id) {
    log.debug("getting Members instance with id: " + id);
    try {
        Members instance = (Members) getHibernateTemplate()
            .get("com.yang.product.booksonline.dao.Members", id);
        return instance;
    } catch (RuntimeException re) {
        log.error("get failed", re);
        throw re;
    }
  }
 
 
  public List findByExample(Members instance) {
    log.debug("finding Members instance by example");
    try {
        List results = getSession()
            .createCriteria("com.yang.product.booksonline.dao.Members")
            .add(Example.create(instance))
        .list();
        log.debug("find by example successful, result size: " + results.size());
        return results;
    } catch (RuntimeException re) {
        log.error("find by example failed", re);
        throw re;
    }
  }  
 
  public Members merge(Members detachedInstance) {
    log.debug("merging Members instance");
    try {
        Members result = (Members) getHibernateTemplate()
            .merge(detachedInstance);
        log.debug("merge successful");
        return result;
    } catch (RuntimeException re) {
        log.error("merge failed", re);
        throw re;
    }
  }

  public void attachDirty(Members instance) {
    log.debug("attaching dirty Members instance");
    try {
        getHibernateTemplate().saveOrUpdate(instance);
        log.debug("attach successful");
    } catch (RuntimeException re) {
        log.error("attach failed", re);
        throw re;
    }
  }
 
  public void attachClean(Members instance) {
    log.debug("attaching clean Members instance");
    try {
        getHibernateTemplate().lock(instance, LockMode.NONE);
        log.debug("attach successful");
    } catch (RuntimeException re) {
        log.error("attach failed", re);
        throw re;
    }
  }
 
  public List findByMembersName(String name){
       log.debug("finding by members' name.");
       try {
             return getHibernateTemplate().find("from Members as members where members.name = ?"
                         ,new String[]{name});
       } catch (RuntimeException re) {
             log.error("finding by members' name failed",re);
             throw re;
       }
  }

     public static MembersDAO getFromApplicationContext(ApplicationContext ctx) {
       return (MembersDAO) ctx.getBean("MembersDAO");
     }
}

三，spring配置
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

     <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
           <property name="driverClassName">
                 <value>com.mysql.jdbc.Driver</value>
           </property>
           <property name="url">
                 <value>jdbc:mysql://localhost:3306/books</value>
           </property>
           <property name="username">
                 <value>root</value>
           </property>
           <property name="password">
                 <value>snrdcqmq</value>
           </property>
     </bean>
     <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
           <property name="dataSource">
                 <ref bean="dataSource" />
           </property>
           <property name="hibernateProperties">
                 <props>
                       <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
                 </props>
           </property>
           <property name="mappingResources">
                 <list>
                       <value>com/yang/product/booksonline/dao/Members.hbm.xml</value>
                 </list>
           </property>
     </bean>
     <bean id="MembersDAO" class="com.yang.product.booksonline.dao.MembersDAO">
           <property name="sessionFactory">
                 <ref bean="sessionFactory" />
           </property>
     </bean>
    
     <bean name="/members" class="com.yang.product.booksonline.action.MembersAction">
           <property name="membersDAO">
                 <ref bean="MembersDAO"/>
           </property>
     </bean>
</beans>
四，struts配置及action类
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN" "http://struts.apache.org/dtds/struts-config_1_2.dtd">

<struts-config>
<data-sources />
<form-beans >
  <form-bean name="membersForm" type="org.apache.struts.validator.DynaValidatorForm">
    <form-property name="sex" type="java.lang.String" />
    <form-property name="password" type="java.lang.String" />
    <form-property name="mail" type="java.lang.String" />
    <form-property name="name" type="java.lang.String" />
  </form-bean>

</form-beans>

<global-exceptions />
<global-forwards />
<action-mappings >
  <action
    attribute="membersForm"
    name="membersForm"
    parameter="action"
    path="/members"
    scope="request"
    type="org.springframework.web.struts.DelegatingActionProxy" >
    <forward name="loginSuccess" path="/index.jsp" />
    <forward name="registerSuccess" path="/index.jsp" />
    <forward name="logoutSuccess" path="/index.jsp" />
  </action>

</action-mappings>

<message-resources parameter="com.yang.product.booksonline.ApplicationResources" />
<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
  <set-property property="pathnames" value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml" />
  <set-property property="stopOnFirstError" value="true" />
</plug-in>
<plug-in className="org.springframework.web.struts.ContextLoaderPlugIn">
  <set-property property="contextConfigLocation" value="/WEB-INF/springContext.xml" />
</plug-in>

</struts-config>

package com.yang.product.booksonline.action;

import java.util.List;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.DynaActionForm;
import org.apache.struts.actions.DispatchAction;

import com.yang.product.booksonline.dao.Members;
import com.yang.product.booksonline.dao.MembersDAO;

/**
* XDoclet definition:
* @struts.action path="/members" name="membersForm" parameter="action" scope="request" validate="true"
*/
public class MembersAction extends DispatchAction {
     private MembersDAO membersDAO;

     public MembersDAO getMembersDAO() {
           return membersDAO;
     }

     public void setMembersDAO(MembersDAO membersDAO) {
           this.membersDAO = membersDAO;
     }
    
     public ActionForward login (ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) {
//            String url = request.getParameter("url");
           String name = (String)((DynaActionForm)form).get("name");
           String password = (String)((DynaActionForm)form).get("password");
           List members = membersDAO.findByMembersName(name);
           if (members != null && members.size() >0) {
                 Members member = (Members)members.get(0);
                 if (password.equals(member.getPassword())) {
                       request.getSession().setAttribute("member",name);
                       //return new ActionForward(url);
                       return mapping.findForward("loginSuccess");
                 } else {
                       return null;
                 }
           } else {
                 return null;
           }
     }

     public ActionForward logout (ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) {
           request.getSession().removeAttribute("member");
           return mapping.findForward("logoutSuccess");
     }

     public ActionForward register (ActionMapping mapping,ActionForm form,HttpServletRequest request,HttpServletResponse response) {
           String name = (String)((DynaActionForm)form).get("name");
           String password = (String)((DynaActionForm)form).get("password");
           String sex = (String)((DynaActionForm)form).get("sex");
           String mail = (String)((DynaActionForm)form).get("mail");
           List members = membersDAO.findByMembersName(name);
           if (members != null && members.size() >0) {
                 return null;
           } else {
                 Members member = new Members();
                 member.setName(name);
                 member.setPassword(password);
                 member.setSex(sex);
                 member.setMail(mail);
                 membersDAO.save(member);
                 return mapping.findForward("registerSuccess");
           }
     }
}

注意到，这里使用了dispatchaction。
五，三个jsp部分内容
index.jsp
<body>
<logic:notPresent name="member" scope="session">
     Welcome,you have not <html:link href="login.jsp">login</html:link>. <br>
</logic:notPresent>
<logic:present name="member" scope="session">
     Welcome,<bean:write name="member" scope="session"/>.<html:link href="members.do?action=logout">Logout</html:link>
</logic:present>
</body>
login.jsp
<body>
  If you haven't registered the system,please <html:link href="register.jsp">register</html:link>
  <html:form action="/members.do?action=login" method="post" focus="name">
    <table border="0">
    <tr>
      <td><bean:message key="members.form.name.label"/>:</td>
      <td><html:text property="name" /></td>
    </tr>
    <tr>
      <td><bean:message key="members.form.password.label"/>:</td>
      <td><html:password property="password" /></td>
    </tr>
    <tr>
      <td colspan="2" align="center"><html:submit><bean:message key="members.form.login.label"/></html:submit></td>
    </tr>
    </table>
  </html:form>
</body>
register.jsp
<body>
  Welcome to register the books online. <br>
  <html:form action="/members.do?action=register" method="POST">
  <bean:message key="members.form.name.label"/>:<html:text property="name"/><br>
  <bean:message key="members.form.password.label"/>:<html:password property="password"/><br>
  <bean:message key="members.form.sex.label"/>:
  <html:select property="sex">
       <html:option key="members.form.sex.male" value="male" />
       <html:option key="members.form.sex.female" value="female" />
  </html:select><br>
  <bean:message key="members.form.mail.label"/>:<html:text property="mail"/><br>
  <html:submit><bean:message key="members.form.register.label"/></html:submit>
  </html:form>
</body>

注意：在开发过程中，本想加上输入验证的，因为前面己经有了这方面的例子，为了不重复，这里就有意去掉了这部分，但要运行这个例子，还是你自己加上validation.xml、validator-rules.xml两个文件，不然会出错。